2,2,2-trifluoro-N-(3-(pyridin-2-yl)-1H-pyrazol-5-yl)acetamide | 1437326-50-5

• 分子结构分类: 有机化合物 - 有机氮化合物
• 英文名称: 2,2,2-trifluoro-N-(3-(pyridin-2-yl)-1H-pyrazol-5-yl)acetamide
• 英文别名: 2,2,2-trifluoro-N-(5-pyridin-2-yl-1H-pyrazol-3-yl)acetamide
• CAS: 1437326-50-5
• 化学式: C₁₀H₇F₃N₄O
• 分子量: 256.187
• InChiKey: MUESZSQNOGOPAL-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.5
• 重原子数：
  18
• 可旋转键数：
  2
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.1
• 拓扑面积：
  70.7
• 氢给体数：
  2
• 氢受体数：
  6

反应信息

• 作为反应物：
  描述：

  2,2,2-trifluoro-N-(3-(pyridin-2-yl)-1H-pyrazol-5-yl)acetamide 、 以 乙醇 为溶剂， 生成
  参考文献：
  名称：

  Asymmetric Friedel–Crafts alkylation of indoles with 2-nitro-3-arylacrylates catalyzed by a metal-templated hydrogen bonding catalyst

  摘要：

  An asymmetric Friedel-Crafts alkylation of indoles with 2-nitro-3-arylacrylates catalyzed by a metal-templated hydrogen bonding catalyst has been established. The asymmetric induction relies on chirality transfer solely from the octahedral metal stereocenter via three weak hydrogen bonds. All the products are provided with good to excellent enantioselectivities while modest diastereoselectivities, which can be converted into a variety of valuable indole-containing chiral building blocks including tryptophan derivatives. (C) 2015 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tetlet.2015.06.046
• 作为产物：
  描述：

  三氟乙酸酐 、 5-氨基-3-(2-吡啶基))-1H-吡唑 在 4-二甲氨基吡啶 、 三乙胺 作用下， 以 二氯甲烷 为溶剂， 以73%的产率得到2,2,2-trifluoro-N-(3-(pyridin-2-yl)-1H-pyrazol-5-yl)acetamide
  参考文献：
  名称：

  Asymmetric Catalysis with an Inert Chiral-at-Metal Iridium Complex

  摘要：

  The development of a chiral-at-metal iridium(III) complex for the highly efficient catalytic asymmetric transfer hydrogenation of beta,beta'-disubstituted nitroalkenes is reported. Catalysis by this inert, rigid metal complex does not involve any direct metal coordination but operates exclusively through weak interactions with functional groups properly arranged in the ligand sphere of the iridium complex. Although the iridium complex relies only on the formation of three hydrogen bonds, it exceeds the performance of most organocatalysts with respect to enantiomeric excess (up to 99% ee) and catalyst loading (down to 0.1 mol %). This work hints at an advantage of structurally complicated rigid scaffolds for non-covalent catalysis, which especially relies on conformationally constrained cooperative interactions between the catalyst and substrates.

  DOI：

  10.1021/ja403777k

文献信息

• Enantioselective Excited-State Photoreactions Controlled by a Chiral Hydrogen-Bonding Iridium Sensitizer
  作者：Kazimer L. Skubi、Jesse B. Kidd、Hoimin Jung、Ilia A. Guzei、Mu-Hyun Baik、Tehshik P. Yoon

  DOI：10.1021/jacs.7b10586

  日期：2017.11.29

  transition-metal photosensitizer leads to efficient Dexter energy transfer and effective stereoinduction. The relative insensitivity of these organometallic chromophores toward ligand modification enables the optimization of this catalyst structure for high enantiomeric excess at catalyst loadings as much as 100-fold lower than the optimal conditions reported for analogous chiral organic photosensitizers.

  电子激发态的立体化学控制是光化学合成中的长期挑战，很少有人知道在三重态光反应中产生高对映选择性的催化体系。我们在这里报告了一种异常有效的手性光催化剂，它使用一系列氢键和π-π相互作用募集前手性喹诺酮。这些底物在过渡金属光敏剂的手性环境中的组织导致有效的德克斯特能量转移和有效的立体感应。这些有机金属发色团对配体修饰的相对不敏感性使得该催化剂结构的优化对于在催化剂负载量下高对映体过量的情况比报道的类似手性有机光敏剂的最佳条件低了100倍。
• Metal-Templated Design: Enantioselective Hydrogen-Bond-Driven Catalysis Requiring Only Parts-per-Million Catalyst Loading
  作者：Weici Xu、Marcus Arieno、Henrik Löw、Kaifang Huang、Xiulan Xie、Thomas Cruchter、Qiao Ma、Jianwei Xi、Biao Huang、Olaf Wiest、Lei Gong、Eric Meggers

  DOI：10.1021/jacs.6b02769

  日期：2016.7.20

  octahedral iridium complex, an exceptionally active hydrogen-bond-mediated asymmetric catalyst was developed and its mode of action investigated by crystallography, NMR, computation, kinetic experiments, comparison with a rhodium congener, and reactions in the presence of competing H-bond donors and acceptors. Relying exclusively on weak forces, the enantioselective conjugate reduction of nitroalkenes

  基于使用双环金属化八面体铱配合物形式的刚性球状结构支架的金属模板化方法，开发了一种异常活泼的氢键介导的不对称催化剂，并通过晶体学、核磁共振、计算研究了其作用模式，动力学实验，与铑同类物的比较，以及在竞争性 H 键供体和受体存在下的反应。仅依靠弱力，硝基烯烃的对映选择性共轭还原可以在低至 0.004 mol% (40 ppm) 的催化剂负载下进行，代表高达 20 250 的周转数。催化剂的速率加速为 2.5 × 10(5 ) 确定。催化的起源可追溯到通过精心协调的氢键和催化剂与底物之间的范德华相互作用，有效稳定过渡态电荷。这项研究表明，仅由氢键和范德华相互作用驱动的不对称催化的熟练程度可以通过底物的直接过渡金属配位与传统的活化相媲美。
• Chiral-at-Metal Octahedral Iridium Catalyst for the Asymmetric Construction of an All-Carbon Quaternary Stereocenter
  作者：Liang-An Chen、Xiaojuan Tang、Jianwei Xi、Weici Xu、Lei Gong、Eric Meggers

  DOI：10.1002/anie.201306997

  日期：2013.12.23

  Metal‐templated organocatalysis: The enantioselective formation of an all‐carbon quaternary stereocenter is catalyzed by the ligand sphere of an inert bis‐cyclometalated iridium complex (see picture). In this complex, the metal‐centered chirality serves as the sole source for the effective asymmetric induction.

  金属为模板的有机催化：全碳四元立体中心的对映选择性形成是由惰性双环金属化铱配合物的配体球形催化的（见图）。在这种复合物中，以金属为中心的手性是有效非对称感应的唯一来源。